diff -X CVS -ruN top.orig/top.c top/top.c
--- top.orig/top.c	Wed Jun 22 15:03:21 2005
+++ top/top.c	Mon Jul 18 17:12:24 2005
@@ -55,6 +55,14 @@
 /* Size of the stdio buffer given to stdout */
 #define BUFFERSIZE	2048
 
+#define PRIVACY
+
+#ifdef PRIVACY
+#include <grp.h>
+#define GRP_NAME "wheel"
+int verify_grp(void);
+#endif
+
 /* The buffer that stdio will use */
 char		stdoutbuf[BUFFERSIZE];
 
@@ -270,6 +278,26 @@
 	ps.pid = (pid_t)-1;
 	ps.command = NULL;
 
+#ifdef PRIVACY
+	if (verify_grp() ) {
+		ps.idle = Yes;
+		ps.system = No;
+		ps.uid = (uid_t)-1;
+		ps.command = NULL;
+	} else {
+		ps.idle = Yes;
+		ps.system = No;
+		ps.uid = getuid();
+		ps.command = NULL;
+	}
+#else
+		ps.idle = Yes;
+		ps.system = No;
+		ps.uid = (uid_t)-1;
+		ps.command = NULL;
+#endif
+
+
 	/* get preset options from the environment */
 	if ((env_top = getenv("TOP")) != NULL) {
 		av = preset_argv = argparse(env_top, &preset_argc);
@@ -771,23 +799,51 @@
 			break;
 
 		case CMD_user:
+#ifdef PRIVACY
+			if(verify_grp() ) {
+				new_message(MT_standout,
+				"Username to show: ");
+				if (readline(tempbuf2, sizeof(tempbuf2), No) > 0) {
+					if (tempbuf2[0] == '+' &&
+						tempbuf2[1] == '\0') {
+						ps.uid = (uid_t)-1;
+					} else if ((uid = userid(tempbuf2)) == (uid_t)-1) {
+						new_message(MT_standout,
+						" %s: unknown user", tempbuf2);
+						no_command = Yes;
+					} else
+						ps.uid = uid;
+						if (putchar('\r') == EOF)
+						exit(1);
+				} else
+					clear_message();
+					break;
+			} else {
+				new_message(MT_standout,
+				"You have to be root");
+				clear_message();
+				ps.system = No;
+				no_command = Yes;
+			}
+#else
 			new_message(MT_standout,
-			    "Username to show: ");
+				"Username to show: ");
 			if (readline(tempbuf2, sizeof(tempbuf2), No) > 0) {
 				if (tempbuf2[0] == '+' &&
-				    tempbuf2[1] == '\0') {
+					tempbuf2[1] == '\0') {
 					ps.uid = (uid_t)-1;
 				} else if ((uid = userid(tempbuf2)) == (uid_t)-1) {
 					new_message(MT_standout,
-					    " %s: unknown user", tempbuf2);
+						" %s: unknown user", tempbuf2);
 					no_command = Yes;
 				} else
 					ps.uid = uid;
-				if (putchar('\r') == EOF)
-					exit(1);
+					if (putchar('\r') == EOF)
+						exit(1);
 			} else
 				clear_message();
-			break;
+				break;
+#endif
 
 		case CMD_system:
 			ps.system = !ps.system;
@@ -909,3 +965,27 @@
 	end_screen();
 	exit(ret);
 }
+
+int
+verify_grp(void)
+{
+	int i = 0;
+
+	struct group *grp;
+	char **g, *username;
+
+	grp = getgrnam(GRP_NAME);
+	username = getlogin();
+
+	for (g = grp->gr_mem; *g; ++g) {
+		if (strcmp(username, *g) == 0) {
+			i = 1;
+			break;
+		}
+	}
+	if(!*g)
+		i = 0;
+
+	return(i);
+}
+